I understand what you mean, but I fail to see how adding some accessibility options would change that.
I keep using Celeste as an example, because it's an even harder game, but it had accessibility options done very well, and everything you say exist in that game and was not harmed in any way.
The game is brutal, it plays into the atmosphere and story, the players bond over it, had to learn to overcome the challenges, there's forums of people talking about how brutal and how many times they died and how happy they were when they made it, etc.
That's why I don't see the resistance to adding options like that, because from my vantage point, it doesn't take anything away, it only expands who can get to experience a similar thing.
The only reason I can think of is if you're saying that you personally couldn't resist turning on all the cheats all the time and thus ruining the experience for yourself. I don't have that problem, and from other Celeste players I don't see many who had that problem. It seems even a lot of people when turning on cheats wait a long time, and then they try to turn on the minimum amount and see if they can make it, and only after failing more time do they maybe try to add another one, etc.
Anyways, that's just my point of view. I respect the people feeling differently.